Area of Triangles, Parallelograms, Kites and Trapeziums

 10.2 Area of Triangles, Parallelograms, Kites and Trapeziums

Estimate the area of various shapes:

(i) Using a grid with equal squares of sides $$1\text{ unit}$$

 Example

(ii) Drawing lines $$1\text{ unit}$$ apart

 Example

The formulae for the area of various shapes:

(i) The area of a triangle

 \begin{aligned} \text{Area} &=\dfrac{1}{2}ab \end{aligned}

(ii) The area of a paralellogram

 \begin{aligned} \text{Area} &=ab \end{aligned}

(iii) The area of a kite

 \begin{aligned} \text{Area} &=\dfrac{1}{2}ab \end{aligned}

(iv) The area of the trapezium

 \begin{aligned} \text{Area} &=\dfrac{1}{2}(a+b)t \end{aligned}

Area of Triangles, Parallelograms, Kites and Trapeziums

 10.2 Area of Triangles, Parallelograms, Kites and Trapeziums

Estimate the area of various shapes:

(i) Using a grid with equal squares of sides $$1\text{ unit}$$

 Example

(ii) Drawing lines $$1\text{ unit}$$ apart

 Example

The formulae for the area of various shapes:

(i) The area of a triangle

 \begin{aligned} \text{Area} &=\dfrac{1}{2}ab \end{aligned}

(ii) The area of a paralellogram

 \begin{aligned} \text{Area} &=ab \end{aligned}

(iii) The area of a kite

 \begin{aligned} \text{Area} &=\dfrac{1}{2}ab \end{aligned}

(iv) The area of the trapezium

 \begin{aligned} \text{Area} &=\dfrac{1}{2}(a+b)t \end{aligned}